Consider the npn transistor shown in figure.

Assume that one-half of the base current enters from each side of the emitter strip and flows uniformly to the center of the emitter. Assume the following parameters for the transistor:

NB = 1016 cm-3,  xB = 0.70 μm

μp = 400 cm2/V-s,  S = 8 μm

Emitter length L = 100 μm

The resistance between x = 0 and x = S/2 for the flow of base current (IB) will be ______ Ω.